error[E0308]: mismatched types --> $DIR/issue-50688.rs:12:9 | LL | [1; || {}]; //~ ERROR mismatched types | ^^^^^ expected usize, found closure | = note: expected type `usize` found type `[closure@$DIR/issue-50688.rs:12:9: 12:14]` error: aborting due to previous error For more information about this error, try `rustc --explain E0308`.